I have tried the download and as I’m working on an iPad it has failed to open for some reason. I’ll try on the desktop - probably tomorrow .
Yes, my system has the 2 button lucas system, not the later system.
And yes at least one switched with ignition terminal either a Lucar terminal or piggyback from a fuse is what I’m looking for and ideally safe for an amp or two.
I have a September 2002 TF with the Lucas Fob, so hopefully same under Steering-wheel fusebox as you:
The good news is that terminal 3 (just out of picture to the left of terminals 4 & 5, which I have circled in Green in the picture below0, is ONLY live when ignition switch is in the Accessory or running positions. I have just used this terminal to give power to a USB outlet, to power my Satnav. It works a treat. I was getting fed-up of finding my sat nav still powered-up after leaving my car in the garage for a few days after a run. The current drain was enough to flatten the TF battery. The cigarette lighter socket is permanently live on my TF, and I think I read that others of "our" generation of car are the same.
I have protected my USB feed from terminal 3 with an in-line fuse, not sure if that /those numbered outlets are already protected, but it seemed wise.